瑜伽論記 12.252

12.252

第二偏解波羅蜜多行中有三，初解波羅蜜義；第二、由三因緣次第建立；第三、攝彼六度以為三學。

In the second part, specifically explaining the pāramitā practice, there are three sections: first, explaining the meaning of pāramitā; second, establishing the sequence based on three causes and conditions; third, subsuming those six pāramitās into the three trainings.